Impulse sender



Feb. 17, 1942. G. ZAPF 2,273,550

IMPULSE SENDER Filed May 25, 1938" 2 Sheets-Sheet 1 q' -ll \1 Pi an! Lnk 1 FIG. 3

INVENTOR.

GEORG ZAPF.

ATTORNEY.

Feb. 17, 1942.

G. ZAPF IMPULSE SENDER Filed May 25, 1938 '2' Sheets-Sheet 2 l-II FIG.5

FIG. 6

INVENTOR. GEORG ZAPF %Z I I l ATTORNEY.

Patented Feb. 17, 1942 HVIPULSE SENDER Georg Zapf, Berlin-Charlottenburg, Germany, as-

signor to Siemens & Halske Aktiengesellschaft, Siemenssta'dt, near Berlin, Germany Application May 25 1938, Serial No. 210,042

In Germany June 15, 1937 8 Claims.

The subject of the invention is a numerical sender with a key strip, through whose keys a mechanical interpreting device is influenced. The invention aims at a construction of the numerical sender that will simplify and expedite operation and at the same time correct the impulse sent'out.

Numerical senders with only one key strip are already known which so work that to send out several figure numbers a corresponding series of impulses is sent out for each digit through the same key strip. In this way an impulse sending switch device tests the contacts set by the keys electrically one after another so that the setting I of the next figure can be immediately proceeded with, before the previously setfigure is completely tested. This arrangement, however, shows, a very complicated construction. With another arrangement of prior artwith onlyone key strip either the pressing of the succeeding key is prevented until the impulse characterized by the first key is sentout or a-special warning signal comes into operation when a second key is operated too quickly. Further numerical senders possessing only one key board are known by whose keys stops are switched into the path of a cam so that a mechanical storing and an electrical transmission of the impulses to be sent out results. With this arrangement, however, the operation of the key: strip is accordingly very much delayed.

Numerical senders are also known which permit a translating and correcting of the impulses through the transferring device the storing of the driving powerfor'an independently running impulse sender is efiected and'also the choice of the stops limiting its path.

Mechanical impulse sending devices, so called impulse translators which transmit independently incoming impulses, have in themselves likewise already been suggested for installations, in

which an impulse relay is operated by the influence of incoming impulses, and in which these "incoming impulses are "sent on corrected or strengthened. Through the combination of a single bank numerical sender and a mechanical translator with a mechanical impulse sendin device a predominantly mechanically working numerical sender is created whose construction is simple and economical of space, and which in view of its mechanical construction works with certainty and reliability, makes possible rapid op-v eration of the set of keys and allows the impulse sent out to be in correct time independent- 1y of the speed of operating the key board, so that by a simple remodelling of the arrangement it is possible without anything further to send the impulse out converted. A further advantage is the small force with which the keys can be pressed in, since it is only the force of the restoring spring that has to be overcome.

In the following the subject of the invention is described and represented in the attached drawings. I t

Fig. 1 is a diagrammatic representation of the numerical sender in partial section.

Fig. 2 is a diagrammatic.representation of the keyboard with its translating device.

Fig; 3 is a principal circuit for the arrangementofFig. 1.

Fig. 4 is a further principal circuit for another constructional example of the numerical sender.

Fig. 5 is a diagrammatic partial representation of a further constructional example of the numerical sender.

Fig. 6 is a plan view of a portion of the structure shown in Fig. 5. i

A key strip l (Figs. 1 and 2) possesses 10 keys 2 numbered 1-0, which are held in their rest position by'a spring 3. In the operating path of each key 2, a lever 4 is arranged, which rotates about an axis 5. .The lever 4 possesses an end portion 6 which yields in one direction. By pressing the'key 2 the lever engages at its end 6 with a lever l and turns this about its axis. In the course of this movement the end 6 slips away from the edge of the lever 1 so that this immediately becomes free and travels back to its rest position under the influence of its spring 9. In this way, independent of the time for which the :keyl is depressed the lever 1 is operated only for a short time. When the key is released the lever 4 travels back to its rest position also under the influence of its spring H1, and the flapping end 6 can yield at the lever 1. By the operating of the lever 1 pins II, which are provided to bemovable in a disc l2, are actuated. Round the circumference of the disc 12 the pins II are so arranged thatthey have a separation from each other corresponding to the lever I. In their existing set position they are held by friction, by way of example by a spiral spring gripping them round. The disc l2 sits on an axle l3, which carries a toothed wheel I4, which engages with a cog I5 of a motor M. Furthermore, another toothed wheel I5 is fixed on the axle I3, and engages in a 1:1 ratio with a toothed wheel I6, which is arranged on a hollow shaft H, which is supported in a bracket It. On the hollow shaft there sits a movable bush or disc l9 cammed with it in the direction of rotation, which can be displaced by a clutch 2% which is controlled by a spring 22. The clutch comes under the influence of an electromagnet 2|. In the arrangement represented in Fig. 1 it is assumed that the magnet 2| i excited, so that the bush I9 is shoved as far as its left hand stop and in this arrangement presses to the left a pin 23 which acts, on a lever 2 and displaces this in the clockwise direction against the restoring force of a spring 25. In this arrangement the lever 24 juts out onto the section of the movable pins 26. pin ZEi are circularly placed in the support It and-equivalent in number to the pins H, e. g., 4 x 10. When the magnet 2| is deenergized, the pin-23 under; the influence of the spring effective 'overthele ver 24 travels back and presses the bushes faras its right hand stop, since it would be freed by the clutch 29. In this way the lever 24 presses on one of the circularly arranged pins 25, which it stands directly opposite and pushes this to the left. The pin 25 so comes in the way of apin 21, which is hired in the turning disc 28." The turning disc 28 is controlled by a spiral spring 30, which is fastened to the disc 28- atone end and at its other end to a cup 3| for the spring, which is secured on the hollow shaft IT. A push-bar 32 extends through the hollow shaft H and stands with one of its ends in contactwith an armature 33 of an electromagnet 3%, whereby the armature 3.3 against spring 35 is influenced. The other end of the a push-bar 32 works on a double armed lever 36, which is turnable about an axis 31, which is arranged in apedestal bearing 38 on the disc 28.

One end 351 of the lever 35 stands in contact with the peg 21 which is controlled by a spring to.

The disc 28 is constructed as a toothed wheel,

J its depressed condition'opposite a contact nk and keeps this open. When now one of the keys 2' is depressed, one of the pegs l is displaced over the leverst and T and at the same time independently of the pressure of the. key a'contact anI "is transitorily-closed. Hence a current passes via earth, and relay 2 I, battery arrangement, so that the-relay?" is excited. The relay 2| brings the lever 24 out of reachof the circle of pins 26, so that the lever 24 connected with the hollow shaft ll canbe freely displaced. At the same time with the exciting of the relay 2l this closes its contacts 2| and 2|". Over earth, anl, 2|, M,

battery, the motor M is excited and begins to turn.

The relay 2| holds after the operation of the contacts anl over battery 2|, 2|, ab, 2|,

earth. With .the'commencement of the turning of the disc I2'the peg still depressed from the preceding operation leaves its place so that the The movable contact nlc is closed, so that henceforth the motor is kept switched in over earth, nk, M, battery. At the same time the contact ab is opened independently by the initial motion of the disc l2, so that after that, the motor M and the relay 2! holds, only dependent in addition on the contact 11k. In the course of the rotation the pin 1! depressed in the preceding operation is put back into its initial position by a guide 41. The motor now keeps turning, until the next depressed peg opens the contact nk and then the motor M as well as the relay 2| is switched oil and at the same time the lever 24 is allowed to travel back to its initial position, under the influence of the spring 25, whereby the lever 24 pushes the pin 26, which through the turning of the hollow shaft ll taking place at the same time stands opposite to the left and with that brings it within the reach of the pin 2?. Over the pin 26 pushed to the left by the previous setting, the pin 2'! touching it in this position, the push-bar 32 and the armature 33, the relay 34 is excited independently of thedeexcitation of the relay 2|, so that this relay, by means'of its armature 33 pushes the push-bar 32 to the left in such a manner that the pin 2'! is pressed to the right over the lever 39 and so pushes the pin 26 out of its path; The-excitation of the relay 34 lasts only a short time, as will be explained more in detail presently, so that under the influence of the spring t0 the peg 2'! travels back to its initial position, whereby the check for the disc 28 is lifted out of the way, and the disc now begins to rotate under the influence of the spring 30, which has been wound. up by the displacement of the hollow shaft l1, until the peg 21 strikes on the next peg 25' which is pushed in its way. During this motion the. cam has operated the impulse contact 45 corresponding to the impressed key 2.

As is clear iromtheabove, the sending out of the impulse over the. contact 36 in a manner governed by the brake it results completely independently of the speed of pressing in the key 2 andthe turning velocity of the characterizing device, namely'the disc l2; Owing to this independence the'velocity ofthe driving of the characterizing device by the motor M can be made as big as is desired, so that the easily operated keys can be operated very quickly one after the other i. e., the operations can follow one another practically without pause. By the quick turns of the disc l2 following one another a plurality of definite pegs 26 corresponding to the operated keys 2 are switched into the path of the pegs 21 by means of the lever 24 likewise taken with the motor over the hollow shaft l1, whereby the disc 28 slowly running down is switched from peg to peg, so that through the corresponding switching measure the relay 34 is excited each time for a short while after the contact of the peg 2'! with one of the pushed in pegs 2S and in this way the further turning of the disc 28 in the manner previously described is effected, as far as the next displaced pin.

By the combination of a mechanical, independently rotating impulse sending device with a mechanical transferer driven in an unusual manner the numerical sender is not only simple and economical of space in its total construction but there is guaranteed a sure method of working of the numerical sender through the predominantly mechanical construction.

In the switching principal according to Fig. 4 the technical switching operations are more distinguished which in one working of the arrangement occur according to Fig. 1 in which, however, it is assumed that the release contact cm| influenced by the key 2 is not merely transiently closed but for as long as the key is depressed.

Moreover, the switching on of the impulse send- .ing disc 28 described above from pin to peg is effected by a particular contact breaker. If the release contact anl is pressed for a long or short time the relay Anl is excited over earth, (mid Anl, anZ, anl, battery and opens its contact (ml, so that now the relay A122 is excited also, and with its contact cm2 short circuits the relay An! In this way the relay Anl is only excited for a short time. independently of the duration of the operation of the contact anl. The relay Anl closes its contact anl, which like the contact anl in Fig. 3 excites the relay 2|. Thereby the relay 2| closes its contact 2| and switches in the motor M over earth, 2|, ab. When the turn- 'ingbegins both lifter'contacts nkl and 12.70 are closed independently of the motion of the disc l2.

nkl brings the relay Ab over earth, nkl, resistance, battery. The relay Ab opens its contact ab so that the motor now in dependence upon the contact nlc remains switched on until this is opened under the influence of one of the depressed pins The starting magnet 34 for the impulse sending disc 28 is operated by a circuit breaker U over earth, circuit breaker U, relay H, contact hl, relay 34 and thus, for example, the circuit breaker U sends out an impulse of 50 milli-seconds every 300 to 500 milli-seconds.

.- Hence the relay H also energizes, and opens its contact Ill and so switches off relay 34 immediately and closes its contact n2, by which the second winding of the relay is excited over battery, resistance h2, I-III,earth. Owing to this the relay I-I holds until the contact 25/2! formed by the peg 2'! on the one side and the peg 26 on the other is closed, i. e., until the disc 28 has reached the next depressed peg 26, upon which the winding EU is short-circuited over earth, HII, 26/21, earth, and releases and so makes the circuit for the relay 34 controlled by the circuitbreaker. By corresponding switching operations the switching further or the disc 28 by the last depressed peg 26 is prevented in a known manner.

In Fig. 5 a variation of the numerical sender according to Fig. 1 is shown, in which a translation of the characterized impulse results, for

. example, complementary impulses are given by this arrangement. If one therefore has characterized an impulse series of four impulses by pressing the key "4 then the arrangement of Fig. 5 gives out a series of six impulses. When by pressing a key 2 the motor M which drives the axle i3 over its toothed wheel l5 and the cog M and so also the cog l6 over the cog I5, is released the cog l6 carries a hollow axle with it. The magnet 2| is thus not yet excited, so that the clutch 20 frees the bush under the influence of the spring 22 which sleeve lies' against its right-hand stop on the hollow shaft. The hollow shaft 48 and the hollow shaft I! are separated from one another in this position, since a coupling 69 is provided which stands in connection with the clutch over the lever in such a manner that when the relay 2| is not excited the coupling 49 is separated from the hollow shaft 48. A switching member 5| is also carried by the hollow shaft 48 driven by the motor M, which member slides on contact segment 52 which is arranged on a disc 53. If for example, the key "4 is depressed, a switching off of the motor is next effected over the contact nk, when the corresponding pin is operated and at the same time a switching on of the relay 2| whereby over thesliding contact 5|, 52 the circuit for the motor is made again independently of the contact nic. With the excitation of the magnet 2| the lever 24 is taken out of reach of the pin 25 in the pre-described manner and at the same time the coupling 49 is inserted, so that now the further turning of the motor causes a displacement of the lever 24 until the contact member 5| has released the segment 52 andso stopped the motor anddeenergized themagnet 2 I. There results, as described, the pushing away of a peg translator can also be used to translate incoming impulses with advantages, whereby instead of the .motor M and the cog i5 a stepping switch controlled by the incoming impulses effects the cog [6. This type of translating preparation makes possible the use of numerical senders also in arrangements without the decadic system and/or the use of impulse transferring parts for coupling a system, which does not work with the decadic system. This coupling device is particularly simple with the construction of the numerical sender according to the invention, which is essentially characterized by the combination of a key strip and an unusually driven translating device with the impulse translator.

What is claimed is:

1. In combination, a sender for transmitting trains of impulses in accordance with markings applied thereto, a motor for driving said sender, a second motor, a key set for applying the markingS to the sender, and means responsive to the actuation of any key for operating said second motor to store potential energy in said first motor.

2. A combination as claimed in claim 1, wherein said second motor stores in said first motor different amounts of potential energy responsive to the actuation of difierent keys.

3. In combination, an impulse sender, two motors, a key set for applying one or more markings to said sender in rapid succession, means responsive to the actuation of any key for operating one of said motors to store potential energy in the other of said motors, said other motor thereafter eirective to drive said sender at a predetermined rate regardless of the rapidity with which said sender is marked thereby to transmit one or more trains of impulses each dependent upon one of the markings applied to said sender.

4. In an impulse sender, a series of elements, a set of keys for controlling the marking off of any desired portion of the series, the portions corresponding to different keys containing different numbers of said elements, motor driven means thereafter associated with the elements of the marked-oil? portion in sequence and slicetive to control the transmission of impulses of a number dependent upon the number of elements in said portion, and means controlled by the actuation of any key to store driving power in the motor for said last means.

.erating an impulse of j predetermined I maximum duration to initiate the operation ofsaid. register, discriminating means operated differently in detogether, means operated one orsmore times' in successionand efiective-upon each-operation to rotate'one of themembers through a predetermined angle, means 'for rendering .saidclutch effective after said -one member has rotated through .any desired amount ofsaid predetermined angle thereby to cause the other member to be driven by said onememberonly during the remainder of thatrotation of said onetmember,

and means controlled by said other member to sendone or more groups of impulses each depending upon the angle through which said other member is moved during a rotation of said one member.

'7. In a digit registering device, a plurality of ,keyseach having assigned to it'a digital value, a

member; moved through a, predetermined numb er of positions responsive to the actuation of any -of the actuated key to link said second member to-the-first memberafter said first member has moved through a certain number of said predetermined number of positions, said certain number depending upon the digital value of the actuated key, and means controlled by the movement of the second-member tovregister a digit.

8. In combination, a sender for'transmitting trains of impulses in accordance with markings applied thereto, a motor for driving said sender, a key set for applying markings to the sender, means responsive to the actuation of any key for storing energy in said motor, said means controlled at times by the actuation of two of said keys in succession to accumulate in said-motor a greater amount of energy than could be stored therein by actuation of either one of said two keys alone.

GEORG ZAPF. 

